"Agricultural activities" means the normal actions associated with the production of crops: such as plowing, cultivating, minor drainage, and harvesting; and/or raising or keeping of livestock, including operation and maintenance of farm and stock ponds, drainage ditches, irrigation systems, and normal operation, maintenance, and repair of existing serviceable agricultural structures, facilities, or improved areas. The term "agricultural activities" as used within this Title does not include the practice of aquaculture. Forest practices regulated under Chapter 76.09 RCW and Title 222 WAC are not included in this definition. (Section 18.25.030).

"Agricultural activity, new" means: (1) Any agricultural activity that was commenced after February 2, 1992; or (2) use of land for agricultural activities after a previously used wetland, critical fish or wildlife habitat area, or flood hazard area, and/or its associated buffer, has lain idle for more than five years, unless the idle land is registered in a federal or state soils conservation program; or (3) any actions that serve to expand the existing agricultural activity beyond the original geographic limits and/or causes greater impacts to the functions or values of a wetland, critical fish or wildlife habitat area, or flood hazard area and/or its associated buffer (Section 18.25.030).

"Agricultural land" means land primarily devoted to the commercial production of horticultural, viticultural, floricultural, dairy, apiary, vegetable, or animal products or of berries, grain, hay, straw, turf, seed, Christmas trees (not subject to the excise tax imposed by RCW 84.33.100 through 84.33.140), or livestock, and which has long-term commercial significance for agricultural production (Section 18.25.030).

The "Agricultural Resource Lands (ARL)" zone classification includes land primarily devoted to the commercial production of agricultural products and is applied to parcels outside of urban growth areas that meet certain criteria (Section 18A.10.090 C.2.a).

"Barn" means any building used for agricultural purposes that contains items generally associated with farming including, but not limited to, farm equipment such as tractors, or farm animals such as livestock (Section 18.25.030).

"Flood hazard areas" means the floodplain areas of land located in floodplains that are subject to a one percent or greater chance of flooding in any given year. These areas include, but are not limited to, streams, rivers, lakes, coastal areas, wetlands, and the like (Section 18.25.030).

"Floodfringe" means the area subject to inundation by the base flood, but outside the limits of the floodway, and which may provide needed temporary storage capacity for flood waters (Section 18.25.030).

"Floodway" means the channel of a river, marine water, or other watercourse, and the adjacent land areas that must be reserved in order to convey and discharge the base flood without cumulatively increasing the water surface elevation by more than one foot, those areas designated as deep and/or fast-flowing water, and Channel Migration Zones where detailed CMZ studies have been adopted by Pierce County (Section 18.25.030).

"Livestock" means all cattle, sheep, goats, or animals of the bovinae family; all horses, mules, or animals of the equinae family; all pigs, swine, or animals of the suinae family; and ostriches, rhea, and emu (Section 18.25.030).

The "Rural Farm (RF)"zone classification is intended to protect agricultural lands that may or may not have soils to qualify as ARL. The RF classification will reflect the properties that have historically been used for agricultural activities or zoned agriculture that have not been converted to more intensive and incompatible uses or that are currently being used for agricultural activities, which may include noncommercial agricultural or farming activities (Section 18A.10.090 B.2.g).